如图,已知经过点D(2,
)的抛物线
(m为常数,且m>0)与x轴交于点A、B(点A位于B的左侧),与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/2015/9/6/1573909843025920/1573909849563136/STEM/b606b1b8056c415b914b49c46650553d.png)
(1)填空:m的值为 ,点A的坐标为 ;
(2)根据下列描述,用尺规完成作图(保留作图痕迹,不写作法):连接AD,在x轴上方作射线AE,使∠BAE=∠BAD,过点D作x轴的垂线交射线AE于点E;
(3)动点M、N分别在射线AB、AE上,求ME+MN的最小值;
(4)t是过点A平行于y轴的直线,P是抛物线上一点,过点P作l的垂线,垂足为点G,请你探究:是否存在点P,使以P、G、A为顶点的三角形与△ABD相似?若存在,求出点P的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47153fdd73c0661fa460130082e30929.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f671c030f7ea5d9cb3002086f9d2dbd3.png)
![](https://img.xkw.com/dksih/QBM/2015/9/6/1573909843025920/1573909849563136/STEM/b606b1b8056c415b914b49c46650553d.png)
(1)填空:m的值为 ,点A的坐标为 ;
(2)根据下列描述,用尺规完成作图(保留作图痕迹,不写作法):连接AD,在x轴上方作射线AE,使∠BAE=∠BAD,过点D作x轴的垂线交射线AE于点E;
(3)动点M、N分别在射线AB、AE上,求ME+MN的最小值;
(4)t是过点A平行于y轴的直线,P是抛物线上一点,过点P作l的垂线,垂足为点G,请你探究:是否存在点P,使以P、G、A为顶点的三角形与△ABD相似?若存在,求出点P的坐标;若不存在,说明理由.
更新时间:2016-12-06 02:30:41
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【推荐1】如图,在△ABC中,∠CAB=90°,D是边BC上一点,
,E为线段AD的中点,连结CE并延长交AB于点F.
(1)求证:AD⊥BC.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60a05bee6e4d2d98092abd4dca53c8ef.png)
(1)求证:AD⊥BC.
(2)若AF:BF=1:3,求证:CD:DB=1:2.
![](https://img.xkw.com/dksih/QBM/2020/1/11/2374958867128320/2375229657145344/STEM/8b6dd6e1ad0c4d62a5899bf8c11806ed.png?resizew=181)
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【推荐2】如图1.抛物线
经过点
点
在抛物线
上,且在
轴的上方,点
的横坐标记为
.
(1)求抛物线的解析式:
(2)如图2.过点
作
轴的平行线交直线
于点
.交
轴于点
,若
平分
,求
的值:
(3)点
在直线
上.点
在
轴上,且位于点
的上方,那么在抛物线上是否存在点
,使得以点
为顶点的四边形是菱形?若存在,请直接写出菱形的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/022d34be5fca3744188b4b0e28689c18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(1)求抛物线的解析式:
(2)如图2.过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65b140293153059aa01eaca0c480beb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/15/cd9decae-591f-42ea-b007-d45a629182e6.png?resizew=319)
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【推荐1】如图
,平面直角坐标系
中,抛物线
过点
,
和
,连接
,点
为抛物线上一动点,过点
作
轴交直线
于点
,交
轴于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/c9761f51-9a28-43ee-b2c0-80dcc8d12bdf.png?resizew=461)
(1)求抛物线和直线
的解析式;
(2)如图
,连接
,当
为等腰三角形时,求
的值;
(3)当
点在运动过程中,在
轴上是否存在点
,使得以
为顶点的三角形与以
为顶点的三角形相似(其中点
与点
相对应),若存在,直接写出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d57173ef4cd72eb270686875dfd623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f605a7fc2f1064fe14882ee426839db.png)
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(1)求抛物线和直线
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(2)如图
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(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】如图,在平面直角坐标系
中,已知抛物线
与
轴交于
,
两点,与
轴交于点
,连接
,点
为第二象限抛物线上的动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/a1908dea-ce2e-4185-beab-862203dfa313.png?resizew=301)
(1)求
、
、
的值;
(2)连接
、
、
,求
面积的最大值;
(3)过
作
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,是否存在这样的点
、
,使得
与
相似,若存在,请写出所有符合条件的
点坐标,并选其中一个写出证明过程;若不存在,请说明理由.
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(1)求
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(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
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(3)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b154270249b0ef54ddb26137b2681a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87b2f781cafa7989d81f9bf8c42b150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf890fb28f5aff86f9bbf66ce643381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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